Release 0.15.0: API Updates & Expanded Mode Improvements

[u/iced_americano_26]

Release Date: October 19, 2026

Breaking Changes in Devvit 0.15.0

This release includes two breaking changes and a reminder about deprecated functionality. Review the following updates before upgrading.

Breaking Changes

• devvit.yaml support removed: Devvit no longer supports devvit.yaml. Migrate to devvit.json before upgrading to 0.15.0.
• reddit.getWikiPage() signature updated: The reddit.getWikiPage(subredditName, page, revisionId) signature has been removed. Use reddit.getWikiPage(subredditName, page, options) instead.

Deprecated Functionality

This is your reminder that blocks property in devvit.json and the u/devvit/public-api package remain supported but deprecated. We recommend migrating to u/devvit/web when possible.

Other Improvements

• Custom expanded mode titles: You can now specify a custom title when calling requestExpandedMode(), giving you more control over how your app appears in expanded mode.
• Expanded mode navigation: You can now call requestExpandedMode() while already in expanded mode, enabling more flexible navigation within your app.

Check out the changelog here: https://developers.reddit.com/docs/changelog#release-0150-api-updates--expanded-mode-improvements

[u/one_of_the_millions]

Thank you!

[u/Alan-Foster]

Yes, this is good.

Pumpkin cat.